View from the packhorse bridge, Idwal Cottage, head of Nant Ffrancon, Snowdonia National Park, Gwynedd, UK
The arch framing this view is Pont Pen-y-benglog, carrying the busy A5 main road over the start of the Afon Ogwen, immediately below the outlet of Llyn Ogwen.
However, fewer people are aware of the early mediæval bridge, a dry stone arch now directly beneath the Telford's more modern road bridge. It's great to clamber down to the water level and watch the river hurtle over Rhaeadr Ogwen (Ogwen Falls), joined by the corresponding outlet stream of Llyn Idwal.
Well, it's great in good weather, or to shelter from light rain, but in hindsight I don't recommend attempting to reproduce this image: today's weather was heavy rain onto frozen ground – walking on potentially icy rocks near the edge of a high waterfall mightn't have been my best-ever idea.
Pen yr Ole Wen (978 m asl) rises off the left of the image, with Tryfan (917 m) barely visible in low cloud obscuring the background.